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F.-PELZE R. GENT-RIPUGAL PUMP AND. VENTILATOR.

No. 490,922 Patented Jan. 31, 1893.

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' F. PELZER.

GENTRIFUGAL BUMP 'AND'VENTILATOR.

No. 490.922. Patented Jan. 31; 1893.

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W I A/AHL3\L%/ wi Y W" FRIEDRICH PELZER, OF DORTMUND, GERMANY.

CENTRIFUGAL PUMP AND VENTILATOR.

Eric.

SPECIFICATION forming part of Letters Patent No. 490,922, dated January31, 1 893.

Application filed February 18, 1891. Serial No. 381 ,803. (No model.)Patented in Germany October 18, 1889, No. 52,281 in Austria- HungaryJune 22, 1890,110. 10,364: and No. 25,770, and in England September 1,1890, No- 19,686.

To all whom it mag concern:

Be it known that I, FRIEDRTCH PELZER, a subject of the Emperor ofGermany, and a resident of Dortmund, Germany, have invented certain newand useful Improvements in Centrifugal Pumps and Ventilators, (for whichI have obtained Letters Patent in Germany, No. 52,231, dated October 18,1889; in Austria-Hungary, No. 10,364 and No. 25,770, dated June 22,1890, and in England, No. 19,636, dated September 1, 1890,) of which thefollowing is a specification.

In centrifugal pumps or fan-blowers the re ceiver serves for the purposeof utilizing the active forces of the air or liquid passing from theedges of the wings by changing the speed into pressure. It is well knownthat theoretical calculation exists by which the dimensions of thereceivers can be determined, which calculations, however, have butlittle value in practice, as in most cases the data required for makingthe calculations can not be obtained, or, if they can be obtained, donot remain uniform. If, for example, for certain conditions, thedimensions of the receiver of a fan-blower are adapted fora greateramount of air than actually is forced by the fan-blower at a certainfixed circumferential speed, the speed of the air issuing from the rimof the fan-blower does not decrease so rapidly as to correspond to thedimensions of a larger receiver, and, as a result thereof, circularcurrents are produced and loss of poweris caused. To prevent such loss,it is necessary to collect the air or liquid issuing from the fanbloweror centrifugal pump and permit it to escape in a uniform stream orcurrent corresponding to the mass or quantity and speed of the air orfluid.

The object of my invention is to provide means for thus producing thesaid continuous passage or current.

The invention consists in the combination, with a cylindrical pump orfan-blower, of an annular plate concentric with the fan-blower andadjustable on the axis of the same to form a slot of greater or lesswidths, for the escape of air or liquid from the pump or blower.

The invention also consists in the construction and combination of partsand details,

which will be fully described hereinafter and finally pointed out in theclaims.

Figure 1 is a vertical longitudinal sectional view of one constructionof my improved single acting fan blower. Fig. 2 is a transversesectionalview of the same on the line 2 2, of Fig. 1. Fig. 3 is a verticallongitudinal sectional view of a modification of the same. Fig. 4 is avertical transverse-sectional view of the same on the line 4 4:, of Fig.3. Figs. 5 and 6 are Vertical longitudinal-sectional views of furthermodifications: Fig. 7 is a vertical longitudinal-sectional view of acompound blower. Fig. 8 is a vertical transverse-sectional view of thesame on the line 8 8, of Fig. 7.

Similar letters of reference indicate corresponding parts.

The cylindrical pump orfan-blower A shown in Fig. 1 draws air or liquidfrom one direction only, as indicated by the arrow 00', and the saidfan-blower or centrifugal pump is arranged in a funnel-shaped opening Fin the wall F. Opposite the said funnel-shaped opening F an annularplate W is arranged, between which annular plate W and the funnel-shapedopening F the annular slot M for the escape or passage of the air orliquid is formed. The cylinder 0 is fastened on the wall 0' directlyopposite the fan-blower, and with the annular plate W prevents theexterior air from passing to the fan-blower or cen- I trifugal pump.

On rods E fixed in the Wall F and the wall a C the hangers D are mountedto slide, and these hangers support the plate W so as to adapt the sameto move toward or from the fan A in the space between the walls. Screws0. engage the plate W and projections on brackets a. on the wall 0, andby turning said screws the said plate W can be shifted.

In,the construction shown in Figs. 3 and at, the plate W is replaced byan adjustable cylinder G which also can be. adjusted toward or from thefan-blower or centrifugal pump. In this case the wall 0' is to be madesolid.

Instead of making the funnel-shaped opening F in the wall, thefan-blower can be surrounded by a funnel-shaped piece G, which isadjustable on the line of the axis of the fanblower, as shown in Figs. 5and 6, Fig. 5

showing the adjustable annular plate V, as

shown in Figs. 1 and 2 and Fig. 6 showing the adjustable cylinder 0 asshown in Figs. 3 and 4.

5 Figs. 7 and 8 show a fan-blower that draws in air or liquid from bothsides, as indicated by the arrows m and is surrounded by two sheet-metaladjustable funnels G between which the slot M for the escape of the airor is liquid from the blower is formed. The funnel-shaped pieces G aresuspended and adjusted in thesame manner as the plate W.

Having thus described my invention, I

claim as new and desire to secure by Letters :5 Patent:

1. The combination with a centrifugal pump or fan-blower, of an annularplate concentric with the same and adjustable on the line of the axis ofsaid fan-blower, between which ad- 20 j ustable plate and an adjacentsurface a slot is formed for the escape of air or liquid from thefan-blower or pump, substantially as set forth.

2. The combination with acentrifugal pump or fan-blower, of an annularplate concentric with the blower and adjustable on the axis of saidblower and a funnel in which part of the blower is located,substantially as set forth.

8. The combination with a centrifugal pump or fan-blower, of an annularplate concentric with the fan-blower and adjustable on the axis of thesame, and a funnel surrounding the fan-blower and also adjustable on theaxis of the same,'substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

FRIEDRICH PELZER.

Witnesses:

J OHN HECKMANNS, HEINR. SoHEINs.

